/usr/include/glib-2.0/gobject/gtype.h is in libglib2.0-dev 2.56.1-2ubuntu1.
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2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 | /* GObject - GLib Type, Object, Parameter and Signal Library
* Copyright (C) 1998-1999, 2000-2001 Tim Janik and Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __G_TYPE_H__
#define __G_TYPE_H__
#if !defined (__GLIB_GOBJECT_H_INSIDE__) && !defined (GOBJECT_COMPILATION)
#error "Only <glib-object.h> can be included directly."
#endif
#include <glib.h>
G_BEGIN_DECLS
/* Basic Type Macros
*/
/**
* G_TYPE_FUNDAMENTAL:
* @type: A #GType value.
*
* The fundamental type which is the ancestor of @type.
* Fundamental types are types that serve as ultimate bases for the derived types,
* thus they are the roots of distinct inheritance hierarchies.
*/
#define G_TYPE_FUNDAMENTAL(type) (g_type_fundamental (type))
/**
* G_TYPE_FUNDAMENTAL_MAX:
*
* An integer constant that represents the number of identifiers reserved
* for types that are assigned at compile-time.
*/
#define G_TYPE_FUNDAMENTAL_MAX (255 << G_TYPE_FUNDAMENTAL_SHIFT)
/* Constant fundamental types,
*/
/**
* G_TYPE_INVALID:
*
* An invalid #GType used as error return value in some functions which return
* a #GType.
*/
#define G_TYPE_INVALID G_TYPE_MAKE_FUNDAMENTAL (0)
/**
* G_TYPE_NONE:
*
* A fundamental type which is used as a replacement for the C
* void return type.
*/
#define G_TYPE_NONE G_TYPE_MAKE_FUNDAMENTAL (1)
/**
* G_TYPE_INTERFACE:
*
* The fundamental type from which all interfaces are derived.
*/
#define G_TYPE_INTERFACE G_TYPE_MAKE_FUNDAMENTAL (2)
/**
* G_TYPE_CHAR:
*
* The fundamental type corresponding to #gchar.
* The type designated by G_TYPE_CHAR is unconditionally an 8-bit signed integer.
* This may or may not be the same type a the C type "gchar".
*/
#define G_TYPE_CHAR G_TYPE_MAKE_FUNDAMENTAL (3)
/**
* G_TYPE_UCHAR:
*
* The fundamental type corresponding to #guchar.
*/
#define G_TYPE_UCHAR G_TYPE_MAKE_FUNDAMENTAL (4)
/**
* G_TYPE_BOOLEAN:
*
* The fundamental type corresponding to #gboolean.
*/
#define G_TYPE_BOOLEAN G_TYPE_MAKE_FUNDAMENTAL (5)
/**
* G_TYPE_INT:
*
* The fundamental type corresponding to #gint.
*/
#define G_TYPE_INT G_TYPE_MAKE_FUNDAMENTAL (6)
/**
* G_TYPE_UINT:
*
* The fundamental type corresponding to #guint.
*/
#define G_TYPE_UINT G_TYPE_MAKE_FUNDAMENTAL (7)
/**
* G_TYPE_LONG:
*
* The fundamental type corresponding to #glong.
*/
#define G_TYPE_LONG G_TYPE_MAKE_FUNDAMENTAL (8)
/**
* G_TYPE_ULONG:
*
* The fundamental type corresponding to #gulong.
*/
#define G_TYPE_ULONG G_TYPE_MAKE_FUNDAMENTAL (9)
/**
* G_TYPE_INT64:
*
* The fundamental type corresponding to #gint64.
*/
#define G_TYPE_INT64 G_TYPE_MAKE_FUNDAMENTAL (10)
/**
* G_TYPE_UINT64:
*
* The fundamental type corresponding to #guint64.
*/
#define G_TYPE_UINT64 G_TYPE_MAKE_FUNDAMENTAL (11)
/**
* G_TYPE_ENUM:
*
* The fundamental type from which all enumeration types are derived.
*/
#define G_TYPE_ENUM G_TYPE_MAKE_FUNDAMENTAL (12)
/**
* G_TYPE_FLAGS:
*
* The fundamental type from which all flags types are derived.
*/
#define G_TYPE_FLAGS G_TYPE_MAKE_FUNDAMENTAL (13)
/**
* G_TYPE_FLOAT:
*
* The fundamental type corresponding to #gfloat.
*/
#define G_TYPE_FLOAT G_TYPE_MAKE_FUNDAMENTAL (14)
/**
* G_TYPE_DOUBLE:
*
* The fundamental type corresponding to #gdouble.
*/
#define G_TYPE_DOUBLE G_TYPE_MAKE_FUNDAMENTAL (15)
/**
* G_TYPE_STRING:
*
* The fundamental type corresponding to nul-terminated C strings.
*/
#define G_TYPE_STRING G_TYPE_MAKE_FUNDAMENTAL (16)
/**
* G_TYPE_POINTER:
*
* The fundamental type corresponding to #gpointer.
*/
#define G_TYPE_POINTER G_TYPE_MAKE_FUNDAMENTAL (17)
/**
* G_TYPE_BOXED:
*
* The fundamental type from which all boxed types are derived.
*/
#define G_TYPE_BOXED G_TYPE_MAKE_FUNDAMENTAL (18)
/**
* G_TYPE_PARAM:
*
* The fundamental type from which all #GParamSpec types are derived.
*/
#define G_TYPE_PARAM G_TYPE_MAKE_FUNDAMENTAL (19)
/**
* G_TYPE_OBJECT:
*
* The fundamental type for #GObject.
*/
#define G_TYPE_OBJECT G_TYPE_MAKE_FUNDAMENTAL (20)
/**
* G_TYPE_VARIANT:
*
* The fundamental type corresponding to #GVariant.
*
* All floating #GVariant instances passed through the #GType system are
* consumed.
*
* Note that callbacks in closures, and signal handlers
* for signals of return type %G_TYPE_VARIANT, must never return floating
* variants.
*
* Note: GLib 2.24 did include a boxed type with this name. It was replaced
* with this fundamental type in 2.26.
*
* Since: 2.26
*/
#define G_TYPE_VARIANT G_TYPE_MAKE_FUNDAMENTAL (21)
/* Reserved fundamental type numbers to create new fundamental
* type IDs with G_TYPE_MAKE_FUNDAMENTAL().
* Send email to gtk-devel-list@gnome.org for reservations.
*/
/**
* G_TYPE_FUNDAMENTAL_SHIFT:
*
* Shift value used in converting numbers to type IDs.
*/
#define G_TYPE_FUNDAMENTAL_SHIFT (2)
/**
* G_TYPE_MAKE_FUNDAMENTAL:
* @x: the fundamental type number.
*
* Get the type ID for the fundamental type number @x.
* Use g_type_fundamental_next() instead of this macro to create new fundamental
* types.
*
* Returns: the GType
*/
#define G_TYPE_MAKE_FUNDAMENTAL(x) ((GType) ((x) << G_TYPE_FUNDAMENTAL_SHIFT))
/**
* G_TYPE_RESERVED_GLIB_FIRST:
*
* First fundamental type number to create a new fundamental type id with
* G_TYPE_MAKE_FUNDAMENTAL() reserved for GLib.
*/
#define G_TYPE_RESERVED_GLIB_FIRST (22)
/**
* G_TYPE_RESERVED_GLIB_LAST:
*
* Last fundamental type number reserved for GLib.
*/
#define G_TYPE_RESERVED_GLIB_LAST (31)
/**
* G_TYPE_RESERVED_BSE_FIRST:
*
* First fundamental type number to create a new fundamental type id with
* G_TYPE_MAKE_FUNDAMENTAL() reserved for BSE.
*/
#define G_TYPE_RESERVED_BSE_FIRST (32)
/**
* G_TYPE_RESERVED_BSE_LAST:
*
* Last fundamental type number reserved for BSE.
*/
#define G_TYPE_RESERVED_BSE_LAST (48)
/**
* G_TYPE_RESERVED_USER_FIRST:
*
* First available fundamental type number to create new fundamental
* type id with G_TYPE_MAKE_FUNDAMENTAL().
*/
#define G_TYPE_RESERVED_USER_FIRST (49)
/* Type Checking Macros
*/
/**
* G_TYPE_IS_FUNDAMENTAL:
* @type: A #GType value
*
* Checks if @type is a fundamental type.
*
* Returns: %TRUE on success
*/
#define G_TYPE_IS_FUNDAMENTAL(type) ((type) <= G_TYPE_FUNDAMENTAL_MAX)
/**
* G_TYPE_IS_DERIVED:
* @type: A #GType value
*
* Checks if @type is derived (or in object-oriented terminology:
* inherited) from another type (this holds true for all non-fundamental
* types).
*
* Returns: %TRUE on success
*/
#define G_TYPE_IS_DERIVED(type) ((type) > G_TYPE_FUNDAMENTAL_MAX)
/**
* G_TYPE_IS_INTERFACE:
* @type: A #GType value
*
* Checks if @type is an interface type.
* An interface type provides a pure API, the implementation
* of which is provided by another type (which is then said to conform
* to the interface). GLib interfaces are somewhat analogous to Java
* interfaces and C++ classes containing only pure virtual functions,
* with the difference that GType interfaces are not derivable (but see
* g_type_interface_add_prerequisite() for an alternative).
*
* Returns: %TRUE on success
*/
#define G_TYPE_IS_INTERFACE(type) (G_TYPE_FUNDAMENTAL (type) == G_TYPE_INTERFACE)
/**
* G_TYPE_IS_CLASSED:
* @type: A #GType value
*
* Checks if @type is a classed type.
*
* Returns: %TRUE on success
*/
#define G_TYPE_IS_CLASSED(type) (g_type_test_flags ((type), G_TYPE_FLAG_CLASSED))
/**
* G_TYPE_IS_INSTANTIATABLE:
* @type: A #GType value
*
* Checks if @type can be instantiated. Instantiation is the
* process of creating an instance (object) of this type.
*
* Returns: %TRUE on success
*/
#define G_TYPE_IS_INSTANTIATABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_INSTANTIATABLE))
/**
* G_TYPE_IS_DERIVABLE:
* @type: A #GType value
*
* Checks if @type is a derivable type. A derivable type can
* be used as the base class of a flat (single-level) class hierarchy.
*
* Returns: %TRUE on success
*/
#define G_TYPE_IS_DERIVABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_DERIVABLE))
/**
* G_TYPE_IS_DEEP_DERIVABLE:
* @type: A #GType value
*
* Checks if @type is a deep derivable type. A deep derivable type
* can be used as the base class of a deep (multi-level) class hierarchy.
*
* Returns: %TRUE on success
*/
#define G_TYPE_IS_DEEP_DERIVABLE(type) (g_type_test_flags ((type), G_TYPE_FLAG_DEEP_DERIVABLE))
/**
* G_TYPE_IS_ABSTRACT:
* @type: A #GType value
*
* Checks if @type is an abstract type. An abstract type cannot be
* instantiated and is normally used as an abstract base class for
* derived classes.
*
* Returns: %TRUE on success
*/
#define G_TYPE_IS_ABSTRACT(type) (g_type_test_flags ((type), G_TYPE_FLAG_ABSTRACT))
/**
* G_TYPE_IS_VALUE_ABSTRACT:
* @type: A #GType value
*
* Checks if @type is an abstract value type. An abstract value type introduces
* a value table, but can't be used for g_value_init() and is normally used as
* an abstract base type for derived value types.
*
* Returns: %TRUE on success
*/
#define G_TYPE_IS_VALUE_ABSTRACT(type) (g_type_test_flags ((type), G_TYPE_FLAG_VALUE_ABSTRACT))
/**
* G_TYPE_IS_VALUE_TYPE:
* @type: A #GType value
*
* Checks if @type is a value type and can be used with g_value_init().
*
* Returns: %TRUE on success
*/
#define G_TYPE_IS_VALUE_TYPE(type) (g_type_check_is_value_type (type))
/**
* G_TYPE_HAS_VALUE_TABLE:
* @type: A #GType value
*
* Checks if @type has a #GTypeValueTable.
*
* Returns: %TRUE on success
*/
#define G_TYPE_HAS_VALUE_TABLE(type) (g_type_value_table_peek (type) != NULL)
/* Typedefs
*/
/**
* GType:
*
* A numerical value which represents the unique identifier of a registered
* type.
*/
#if GLIB_SIZEOF_SIZE_T != GLIB_SIZEOF_LONG || !defined __cplusplus
typedef gsize GType;
#else /* for historic reasons, C++ links against gulong GTypes */
typedef gulong GType;
#endif
typedef struct _GValue GValue;
typedef union _GTypeCValue GTypeCValue;
typedef struct _GTypePlugin GTypePlugin;
typedef struct _GTypeClass GTypeClass;
typedef struct _GTypeInterface GTypeInterface;
typedef struct _GTypeInstance GTypeInstance;
typedef struct _GTypeInfo GTypeInfo;
typedef struct _GTypeFundamentalInfo GTypeFundamentalInfo;
typedef struct _GInterfaceInfo GInterfaceInfo;
typedef struct _GTypeValueTable GTypeValueTable;
typedef struct _GTypeQuery GTypeQuery;
/* Basic Type Structures
*/
/**
* GTypeClass:
*
* An opaque structure used as the base of all classes.
*/
struct _GTypeClass
{
/*< private >*/
GType g_type;
};
/**
* GTypeInstance:
*
* An opaque structure used as the base of all type instances.
*/
struct _GTypeInstance
{
/*< private >*/
GTypeClass *g_class;
};
/**
* GTypeInterface:
*
* An opaque structure used as the base of all interface types.
*/
struct _GTypeInterface
{
/*< private >*/
GType g_type; /* iface type */
GType g_instance_type;
};
/**
* GTypeQuery:
* @type: the #GType value of the type
* @type_name: the name of the type
* @class_size: the size of the class structure
* @instance_size: the size of the instance structure
*
* A structure holding information for a specific type.
* It is filled in by the g_type_query() function.
*/
struct _GTypeQuery
{
GType type;
const gchar *type_name;
guint class_size;
guint instance_size;
};
/* Casts, checks and accessors for structured types
* usage of these macros is reserved to type implementations only
*/
/*< protected >*/
/**
* G_TYPE_CHECK_INSTANCE:
* @instance: Location of a #GTypeInstance structure
*
* Checks if @instance is a valid #GTypeInstance structure,
* otherwise issues a warning and returns %FALSE. %NULL is not a valid
* #GTypeInstance.
*
* This macro should only be used in type implementations.
*
* Returns: %TRUE on success
*/
#define G_TYPE_CHECK_INSTANCE(instance) (_G_TYPE_CHI ((GTypeInstance*) (instance)))
/**
* G_TYPE_CHECK_INSTANCE_CAST:
* @instance: (nullable): Location of a #GTypeInstance structure
* @g_type: The type to be returned
* @c_type: The corresponding C type of @g_type
*
* Checks that @instance is an instance of the type identified by @g_type
* and issues a warning if this is not the case. Returns @instance casted
* to a pointer to @c_type.
*
* No warning will be issued if @instance is %NULL, and %NULL will be returned.
*
* This macro should only be used in type implementations.
*/
#define G_TYPE_CHECK_INSTANCE_CAST(instance, g_type, c_type) (_G_TYPE_CIC ((instance), (g_type), c_type))
/**
* G_TYPE_CHECK_INSTANCE_TYPE:
* @instance: (nullable): Location of a #GTypeInstance structure.
* @g_type: The type to be checked
*
* Checks if @instance is an instance of the type identified by @g_type. If
* @instance is %NULL, %FALSE will be returned.
*
* This macro should only be used in type implementations.
*
* Returns: %TRUE on success
*/
#define G_TYPE_CHECK_INSTANCE_TYPE(instance, g_type) (_G_TYPE_CIT ((instance), (g_type)))
/**
* G_TYPE_CHECK_INSTANCE_FUNDAMENTAL_TYPE:
* @instance: (nullable): Location of a #GTypeInstance structure.
* @g_type: The fundamental type to be checked
*
* Checks if @instance is an instance of the fundamental type identified by @g_type.
* If @instance is %NULL, %FALSE will be returned.
*
* This macro should only be used in type implementations.
*
* Returns: %TRUE on success
*/
#define G_TYPE_CHECK_INSTANCE_FUNDAMENTAL_TYPE(instance, g_type) (_G_TYPE_CIFT ((instance), (g_type)))
/**
* G_TYPE_INSTANCE_GET_CLASS:
* @instance: Location of the #GTypeInstance structure
* @g_type: The #GType of the class to be returned
* @c_type: The C type of the class structure
*
* Get the class structure of a given @instance, casted
* to a specified ancestor type @g_type of the instance.
*
* Note that while calling a GInstanceInitFunc(), the class pointer
* gets modified, so it might not always return the expected pointer.
*
* This macro should only be used in type implementations.
*
* Returns: a pointer to the class structure
*/
#define G_TYPE_INSTANCE_GET_CLASS(instance, g_type, c_type) (_G_TYPE_IGC ((instance), (g_type), c_type))
/**
* G_TYPE_INSTANCE_GET_INTERFACE:
* @instance: Location of the #GTypeInstance structure
* @g_type: The #GType of the interface to be returned
* @c_type: The C type of the interface structure
*
* Get the interface structure for interface @g_type of a given @instance.
*
* This macro should only be used in type implementations.
*
* Returns: a pointer to the interface structure
*/
#define G_TYPE_INSTANCE_GET_INTERFACE(instance, g_type, c_type) (_G_TYPE_IGI ((instance), (g_type), c_type))
/**
* G_TYPE_CHECK_CLASS_CAST:
* @g_class: Location of a #GTypeClass structure
* @g_type: The type to be returned
* @c_type: The corresponding C type of class structure of @g_type
*
* Checks that @g_class is a class structure of the type identified by @g_type
* and issues a warning if this is not the case. Returns @g_class casted
* to a pointer to @c_type. %NULL is not a valid class structure.
*
* This macro should only be used in type implementations.
*/
#define G_TYPE_CHECK_CLASS_CAST(g_class, g_type, c_type) (_G_TYPE_CCC ((g_class), (g_type), c_type))
/**
* G_TYPE_CHECK_CLASS_TYPE:
* @g_class: (nullable): Location of a #GTypeClass structure
* @g_type: The type to be checked
*
* Checks if @g_class is a class structure of the type identified by
* @g_type. If @g_class is %NULL, %FALSE will be returned.
*
* This macro should only be used in type implementations.
*
* Returns: %TRUE on success
*/
#define G_TYPE_CHECK_CLASS_TYPE(g_class, g_type) (_G_TYPE_CCT ((g_class), (g_type)))
/**
* G_TYPE_CHECK_VALUE:
* @value: a #GValue
*
* Checks if @value has been initialized to hold values
* of a value type.
*
* This macro should only be used in type implementations.
*
* Returns: %TRUE on success
*/
#define G_TYPE_CHECK_VALUE(value) (_G_TYPE_CHV ((value)))
/**
* G_TYPE_CHECK_VALUE_TYPE:
* @value: a #GValue
* @g_type: The type to be checked
*
* Checks if @value has been initialized to hold values
* of type @g_type.
*
* This macro should only be used in type implementations.
*
* Returns: %TRUE on success
*/
#define G_TYPE_CHECK_VALUE_TYPE(value, g_type) (_G_TYPE_CVH ((value), (g_type)))
/**
* G_TYPE_FROM_INSTANCE:
* @instance: Location of a valid #GTypeInstance structure
*
* Get the type identifier from a given @instance structure.
*
* This macro should only be used in type implementations.
*
* Returns: the #GType
*/
#define G_TYPE_FROM_INSTANCE(instance) (G_TYPE_FROM_CLASS (((GTypeInstance*) (instance))->g_class))
/**
* G_TYPE_FROM_CLASS:
* @g_class: Location of a valid #GTypeClass structure
*
* Get the type identifier from a given @class structure.
*
* This macro should only be used in type implementations.
*
* Returns: the #GType
*/
#define G_TYPE_FROM_CLASS(g_class) (((GTypeClass*) (g_class))->g_type)
/**
* G_TYPE_FROM_INTERFACE:
* @g_iface: Location of a valid #GTypeInterface structure
*
* Get the type identifier from a given @interface structure.
*
* This macro should only be used in type implementations.
*
* Returns: the #GType
*/
#define G_TYPE_FROM_INTERFACE(g_iface) (((GTypeInterface*) (g_iface))->g_type)
/**
* G_TYPE_INSTANCE_GET_PRIVATE:
* @instance: the instance of a type deriving from @private_type
* @g_type: the type identifying which private data to retrieve
* @c_type: The C type for the private structure
*
* Gets the private structure for a particular type.
* The private structure must have been registered in the
* class_init function with g_type_class_add_private().
*
* This macro should only be used in type implementations.
*
* Since: 2.4
* Returns: (not nullable): a pointer to the private data structure
*/
#define G_TYPE_INSTANCE_GET_PRIVATE(instance, g_type, c_type) ((c_type*) g_type_instance_get_private ((GTypeInstance*) (instance), (g_type)))
/**
* G_TYPE_CLASS_GET_PRIVATE:
* @klass: the class of a type deriving from @private_type
* @g_type: the type identifying which private data to retrieve
* @c_type: The C type for the private structure
*
* Gets the private class structure for a particular type.
* The private structure must have been registered in the
* get_type() function with g_type_add_class_private().
*
* This macro should only be used in type implementations.
*
* Since: 2.24
* Returns: (not nullable): a pointer to the private data structure
*/
#define G_TYPE_CLASS_GET_PRIVATE(klass, g_type, c_type) ((c_type*) g_type_class_get_private ((GTypeClass*) (klass), (g_type)))
/**
* GTypeDebugFlags:
* @G_TYPE_DEBUG_NONE: Print no messages
* @G_TYPE_DEBUG_OBJECTS: Print messages about object bookkeeping
* @G_TYPE_DEBUG_SIGNALS: Print messages about signal emissions
* @G_TYPE_DEBUG_MASK: Mask covering all debug flags
* @G_TYPE_DEBUG_INSTANCE_COUNT: Keep a count of instances of each type
*
* These flags used to be passed to g_type_init_with_debug_flags() which
* is now deprecated.
*
* If you need to enable debugging features, use the GOBJECT_DEBUG
* environment variable.
*
* Deprecated: 2.36: g_type_init() is now done automatically
*/
typedef enum /*< skip >*/
{
G_TYPE_DEBUG_NONE = 0,
G_TYPE_DEBUG_OBJECTS = 1 << 0,
G_TYPE_DEBUG_SIGNALS = 1 << 1,
G_TYPE_DEBUG_INSTANCE_COUNT = 1 << 2,
G_TYPE_DEBUG_MASK = 0x07
} GTypeDebugFlags;
/* --- prototypes --- */
GLIB_DEPRECATED_IN_2_36
void g_type_init (void);
GLIB_DEPRECATED_IN_2_36
void g_type_init_with_debug_flags (GTypeDebugFlags debug_flags);
GLIB_AVAILABLE_IN_ALL
const gchar * g_type_name (GType type);
GLIB_AVAILABLE_IN_ALL
GQuark g_type_qname (GType type);
GLIB_AVAILABLE_IN_ALL
GType g_type_from_name (const gchar *name);
GLIB_AVAILABLE_IN_ALL
GType g_type_parent (GType type);
GLIB_AVAILABLE_IN_ALL
guint g_type_depth (GType type);
GLIB_AVAILABLE_IN_ALL
GType g_type_next_base (GType leaf_type,
GType root_type);
GLIB_AVAILABLE_IN_ALL
gboolean g_type_is_a (GType type,
GType is_a_type);
GLIB_AVAILABLE_IN_ALL
gpointer g_type_class_ref (GType type);
GLIB_AVAILABLE_IN_ALL
gpointer g_type_class_peek (GType type);
GLIB_AVAILABLE_IN_ALL
gpointer g_type_class_peek_static (GType type);
GLIB_AVAILABLE_IN_ALL
void g_type_class_unref (gpointer g_class);
GLIB_AVAILABLE_IN_ALL
gpointer g_type_class_peek_parent (gpointer g_class);
GLIB_AVAILABLE_IN_ALL
gpointer g_type_interface_peek (gpointer instance_class,
GType iface_type);
GLIB_AVAILABLE_IN_ALL
gpointer g_type_interface_peek_parent (gpointer g_iface);
GLIB_AVAILABLE_IN_ALL
gpointer g_type_default_interface_ref (GType g_type);
GLIB_AVAILABLE_IN_ALL
gpointer g_type_default_interface_peek (GType g_type);
GLIB_AVAILABLE_IN_ALL
void g_type_default_interface_unref (gpointer g_iface);
/* g_free() the returned arrays */
GLIB_AVAILABLE_IN_ALL
GType* g_type_children (GType type,
guint *n_children);
GLIB_AVAILABLE_IN_ALL
GType* g_type_interfaces (GType type,
guint *n_interfaces);
/* per-type _static_ data */
GLIB_AVAILABLE_IN_ALL
void g_type_set_qdata (GType type,
GQuark quark,
gpointer data);
GLIB_AVAILABLE_IN_ALL
gpointer g_type_get_qdata (GType type,
GQuark quark);
GLIB_AVAILABLE_IN_ALL
void g_type_query (GType type,
GTypeQuery *query);
GLIB_AVAILABLE_IN_2_44
int g_type_get_instance_count (GType type);
/* --- type registration --- */
/**
* GBaseInitFunc:
* @g_class: (type GObject.TypeClass): The #GTypeClass structure to initialize
*
* A callback function used by the type system to do base initialization
* of the class structures of derived types. It is called as part of the
* initialization process of all derived classes and should reallocate
* or reset all dynamic class members copied over from the parent class.
* For example, class members (such as strings) that are not sufficiently
* handled by a plain memory copy of the parent class into the derived class
* have to be altered. See GClassInitFunc() for a discussion of the class
* initialization process.
*/
typedef void (*GBaseInitFunc) (gpointer g_class);
/**
* GBaseFinalizeFunc:
* @g_class: (type GObject.TypeClass): The #GTypeClass structure to finalize
*
* A callback function used by the type system to finalize those portions
* of a derived types class structure that were setup from the corresponding
* GBaseInitFunc() function. Class finalization basically works the inverse
* way in which class initialization is performed.
* See GClassInitFunc() for a discussion of the class initialization process.
*/
typedef void (*GBaseFinalizeFunc) (gpointer g_class);
/**
* GClassInitFunc:
* @g_class: (type GObject.TypeClass): The #GTypeClass structure to initialize.
* @class_data: The @class_data member supplied via the #GTypeInfo structure.
*
* A callback function used by the type system to initialize the class
* of a specific type. This function should initialize all static class
* members.
*
* The initialization process of a class involves:
*
* - Copying common members from the parent class over to the
* derived class structure.
* - Zero initialization of the remaining members not copied
* over from the parent class.
* - Invocation of the GBaseInitFunc() initializers of all parent
* types and the class' type.
* - Invocation of the class' GClassInitFunc() initializer.
*
* Since derived classes are partially initialized through a memory copy
* of the parent class, the general rule is that GBaseInitFunc() and
* GBaseFinalizeFunc() should take care of necessary reinitialization
* and release of those class members that were introduced by the type
* that specified these GBaseInitFunc()/GBaseFinalizeFunc().
* GClassInitFunc() should only care about initializing static
* class members, while dynamic class members (such as allocated strings
* or reference counted resources) are better handled by a GBaseInitFunc()
* for this type, so proper initialization of the dynamic class members
* is performed for class initialization of derived types as well.
*
* An example may help to correspond the intend of the different class
* initializers:
*
* |[<!-- language="C" -->
* typedef struct {
* GObjectClass parent_class;
* gint static_integer;
* gchar *dynamic_string;
* } TypeAClass;
* static void
* type_a_base_class_init (TypeAClass *class)
* {
* class->dynamic_string = g_strdup ("some string");
* }
* static void
* type_a_base_class_finalize (TypeAClass *class)
* {
* g_free (class->dynamic_string);
* }
* static void
* type_a_class_init (TypeAClass *class)
* {
* class->static_integer = 42;
* }
*
* typedef struct {
* TypeAClass parent_class;
* gfloat static_float;
* GString *dynamic_gstring;
* } TypeBClass;
* static void
* type_b_base_class_init (TypeBClass *class)
* {
* class->dynamic_gstring = g_string_new ("some other string");
* }
* static void
* type_b_base_class_finalize (TypeBClass *class)
* {
* g_string_free (class->dynamic_gstring);
* }
* static void
* type_b_class_init (TypeBClass *class)
* {
* class->static_float = 3.14159265358979323846;
* }
* ]|
* Initialization of TypeBClass will first cause initialization of
* TypeAClass (derived classes reference their parent classes, see
* g_type_class_ref() on this).
*
* Initialization of TypeAClass roughly involves zero-initializing its fields,
* then calling its GBaseInitFunc() type_a_base_class_init() to allocate
* its dynamic members (dynamic_string), and finally calling its GClassInitFunc()
* type_a_class_init() to initialize its static members (static_integer).
* The first step in the initialization process of TypeBClass is then
* a plain memory copy of the contents of TypeAClass into TypeBClass and
* zero-initialization of the remaining fields in TypeBClass.
* The dynamic members of TypeAClass within TypeBClass now need
* reinitialization which is performed by calling type_a_base_class_init()
* with an argument of TypeBClass.
*
* After that, the GBaseInitFunc() of TypeBClass, type_b_base_class_init()
* is called to allocate the dynamic members of TypeBClass (dynamic_gstring),
* and finally the GClassInitFunc() of TypeBClass, type_b_class_init(),
* is called to complete the initialization process with the static members
* (static_float).
*
* Corresponding finalization counter parts to the GBaseInitFunc() functions
* have to be provided to release allocated resources at class finalization
* time.
*/
typedef void (*GClassInitFunc) (gpointer g_class,
gpointer class_data);
/**
* GClassFinalizeFunc:
* @g_class: (type GObject.TypeClass): The #GTypeClass structure to finalize
* @class_data: The @class_data member supplied via the #GTypeInfo structure
*
* A callback function used by the type system to finalize a class.
* This function is rarely needed, as dynamically allocated class resources
* should be handled by GBaseInitFunc() and GBaseFinalizeFunc().
* Also, specification of a GClassFinalizeFunc() in the #GTypeInfo
* structure of a static type is invalid, because classes of static types
* will never be finalized (they are artificially kept alive when their
* reference count drops to zero).
*/
typedef void (*GClassFinalizeFunc) (gpointer g_class,
gpointer class_data);
/**
* GInstanceInitFunc:
* @instance: The instance to initialize
* @g_class: (type GObject.TypeClass): The class of the type the instance is
* created for
*
* A callback function used by the type system to initialize a new
* instance of a type. This function initializes all instance members and
* allocates any resources required by it.
*
* Initialization of a derived instance involves calling all its parent
* types instance initializers, so the class member of the instance
* is altered during its initialization to always point to the class that
* belongs to the type the current initializer was introduced for.
*
* The extended members of @instance are guaranteed to have been filled with
* zeros before this function is called.
*/
typedef void (*GInstanceInitFunc) (GTypeInstance *instance,
gpointer g_class);
/**
* GInterfaceInitFunc:
* @g_iface: (type GObject.TypeInterface): The interface structure to initialize
* @iface_data: The @interface_data supplied via the #GInterfaceInfo structure
*
* A callback function used by the type system to initialize a new
* interface. This function should initialize all internal data and
* allocate any resources required by the interface.
*
* The members of @iface_data are guaranteed to have been filled with
* zeros before this function is called.
*/
typedef void (*GInterfaceInitFunc) (gpointer g_iface,
gpointer iface_data);
/**
* GInterfaceFinalizeFunc:
* @g_iface: (type GObject.TypeInterface): The interface structure to finalize
* @iface_data: The @interface_data supplied via the #GInterfaceInfo structure
*
* A callback function used by the type system to finalize an interface.
* This function should destroy any internal data and release any resources
* allocated by the corresponding GInterfaceInitFunc() function.
*/
typedef void (*GInterfaceFinalizeFunc) (gpointer g_iface,
gpointer iface_data);
/**
* GTypeClassCacheFunc:
* @cache_data: data that was given to the g_type_add_class_cache_func() call
* @g_class: (type GObject.TypeClass): The #GTypeClass structure which is
* unreferenced
*
* A callback function which is called when the reference count of a class
* drops to zero. It may use g_type_class_ref() to prevent the class from
* being freed. You should not call g_type_class_unref() from a
* #GTypeClassCacheFunc function to prevent infinite recursion, use
* g_type_class_unref_uncached() instead.
*
* The functions have to check the class id passed in to figure
* whether they actually want to cache the class of this type, since all
* classes are routed through the same #GTypeClassCacheFunc chain.
*
* Returns: %TRUE to stop further #GTypeClassCacheFuncs from being
* called, %FALSE to continue
*/
typedef gboolean (*GTypeClassCacheFunc) (gpointer cache_data,
GTypeClass *g_class);
/**
* GTypeInterfaceCheckFunc:
* @check_data: data passed to g_type_add_interface_check()
* @g_iface: (type GObject.TypeInterface): the interface that has been
* initialized
*
* A callback called after an interface vtable is initialized.
* See g_type_add_interface_check().
*
* Since: 2.4
*/
typedef void (*GTypeInterfaceCheckFunc) (gpointer check_data,
gpointer g_iface);
/**
* GTypeFundamentalFlags:
* @G_TYPE_FLAG_CLASSED: Indicates a classed type
* @G_TYPE_FLAG_INSTANTIATABLE: Indicates an instantiable type (implies classed)
* @G_TYPE_FLAG_DERIVABLE: Indicates a flat derivable type
* @G_TYPE_FLAG_DEEP_DERIVABLE: Indicates a deep derivable type (implies derivable)
*
* Bit masks used to check or determine specific characteristics of a
* fundamental type.
*/
typedef enum /*< skip >*/
{
G_TYPE_FLAG_CLASSED = (1 << 0),
G_TYPE_FLAG_INSTANTIATABLE = (1 << 1),
G_TYPE_FLAG_DERIVABLE = (1 << 2),
G_TYPE_FLAG_DEEP_DERIVABLE = (1 << 3)
} GTypeFundamentalFlags;
/**
* GTypeFlags:
* @G_TYPE_FLAG_ABSTRACT: Indicates an abstract type. No instances can be
* created for an abstract type
* @G_TYPE_FLAG_VALUE_ABSTRACT: Indicates an abstract value type, i.e. a type
* that introduces a value table, but can't be used for
* g_value_init()
*
* Bit masks used to check or determine characteristics of a type.
*/
typedef enum /*< skip >*/
{
G_TYPE_FLAG_ABSTRACT = (1 << 4),
G_TYPE_FLAG_VALUE_ABSTRACT = (1 << 5)
} GTypeFlags;
/**
* GTypeInfo:
* @class_size: Size of the class structure (required for interface, classed and instantiatable types)
* @base_init: Location of the base initialization function (optional)
* @base_finalize: Location of the base finalization function (optional)
* @class_init: Location of the class initialization function for
* classed and instantiatable types. Location of the default vtable
* inititalization function for interface types. (optional) This function
* is used both to fill in virtual functions in the class or default vtable,
* and to do type-specific setup such as registering signals and object
* properties.
* @class_finalize: Location of the class finalization function for
* classed and instantiatable types. Location of the default vtable
* finalization function for interface types. (optional)
* @class_data: User-supplied data passed to the class init/finalize functions
* @instance_size: Size of the instance (object) structure (required for instantiatable types only)
* @n_preallocs: Prior to GLib 2.10, it specified the number of pre-allocated (cached) instances to reserve memory for (0 indicates no caching). Since GLib 2.10, it is ignored, since instances are allocated with the [slice allocator][glib-Memory-Slices] now.
* @instance_init: Location of the instance initialization function (optional, for instantiatable types only)
* @value_table: A #GTypeValueTable function table for generic handling of GValues
* of this type (usually only useful for fundamental types)
*
* This structure is used to provide the type system with the information
* required to initialize and destruct (finalize) a type's class and
* its instances.
*
* The initialized structure is passed to the g_type_register_static() function
* (or is copied into the provided #GTypeInfo structure in the
* g_type_plugin_complete_type_info()). The type system will perform a deep
* copy of this structure, so its memory does not need to be persistent
* across invocation of g_type_register_static().
*/
struct _GTypeInfo
{
/* interface types, classed types, instantiated types */
guint16 class_size;
GBaseInitFunc base_init;
GBaseFinalizeFunc base_finalize;
/* interface types, classed types, instantiated types */
GClassInitFunc class_init;
GClassFinalizeFunc class_finalize;
gconstpointer class_data;
/* instantiated types */
guint16 instance_size;
guint16 n_preallocs;
GInstanceInitFunc instance_init;
/* value handling */
const GTypeValueTable *value_table;
};
/**
* GTypeFundamentalInfo:
* @type_flags: #GTypeFundamentalFlags describing the characteristics of the fundamental type
*
* A structure that provides information to the type system which is
* used specifically for managing fundamental types.
*/
struct _GTypeFundamentalInfo
{
GTypeFundamentalFlags type_flags;
};
/**
* GInterfaceInfo:
* @interface_init: location of the interface initialization function
* @interface_finalize: location of the interface finalization function
* @interface_data: user-supplied data passed to the interface init/finalize functions
*
* A structure that provides information to the type system which is
* used specifically for managing interface types.
*/
struct _GInterfaceInfo
{
GInterfaceInitFunc interface_init;
GInterfaceFinalizeFunc interface_finalize;
gpointer interface_data;
};
/**
* GTypeValueTable:
* @value_init: Default initialize @values contents by poking values
* directly into the value->data array. The data array of
* the #GValue passed into this function was zero-filled
* with `memset()`, so no care has to be taken to free any
* old contents. E.g. for the implementation of a string
* value that may never be %NULL, the implementation might
* look like:
* |[<!-- language="C" -->
* value->data[0].v_pointer = g_strdup ("");
* ]|
* @value_free: Free any old contents that might be left in the
* data array of the passed in @value. No resources may
* remain allocated through the #GValue contents after
* this function returns. E.g. for our above string type:
* |[<!-- language="C" -->
* // only free strings without a specific flag for static storage
* if (!(value->data[1].v_uint & G_VALUE_NOCOPY_CONTENTS))
* g_free (value->data[0].v_pointer);
* ]|
* @value_copy: @dest_value is a #GValue with zero-filled data section
* and @src_value is a properly setup #GValue of same or
* derived type.
* The purpose of this function is to copy the contents of
* @src_value into @dest_value in a way, that even after
* @src_value has been freed, the contents of @dest_value
* remain valid. String type example:
* |[<!-- language="C" -->
* dest_value->data[0].v_pointer = g_strdup (src_value->data[0].v_pointer);
* ]|
* @value_peek_pointer: If the value contents fit into a pointer, such as objects
* or strings, return this pointer, so the caller can peek at
* the current contents. To extend on our above string example:
* |[<!-- language="C" -->
* return value->data[0].v_pointer;
* ]|
* @collect_format: A string format describing how to collect the contents of
* this value bit-by-bit. Each character in the format represents
* an argument to be collected, and the characters themselves indicate
* the type of the argument. Currently supported arguments are:
* - 'i' - Integers. passed as collect_values[].v_int.
* - 'l' - Longs. passed as collect_values[].v_long.
* - 'd' - Doubles. passed as collect_values[].v_double.
* - 'p' - Pointers. passed as collect_values[].v_pointer.
* It should be noted that for variable argument list construction,
* ANSI C promotes every type smaller than an integer to an int, and
* floats to doubles. So for collection of short int or char, 'i'
* needs to be used, and for collection of floats 'd'.
* @collect_value: The collect_value() function is responsible for converting the
* values collected from a variable argument list into contents
* suitable for storage in a GValue. This function should setup
* @value similar to value_init(); e.g. for a string value that
* does not allow %NULL pointers, it needs to either spew an error,
* or do an implicit conversion by storing an empty string.
* The @value passed in to this function has a zero-filled data
* array, so just like for value_init() it is guaranteed to not
* contain any old contents that might need freeing.
* @n_collect_values is exactly the string length of @collect_format,
* and @collect_values is an array of unions #GTypeCValue with
* length @n_collect_values, containing the collected values
* according to @collect_format.
* @collect_flags is an argument provided as a hint by the caller.
* It may contain the flag %G_VALUE_NOCOPY_CONTENTS indicating,
* that the collected value contents may be considered "static"
* for the duration of the @value lifetime.
* Thus an extra copy of the contents stored in @collect_values is
* not required for assignment to @value.
* For our above string example, we continue with:
* |[<!-- language="C" -->
* if (!collect_values[0].v_pointer)
* value->data[0].v_pointer = g_strdup ("");
* else if (collect_flags & G_VALUE_NOCOPY_CONTENTS)
* {
* value->data[0].v_pointer = collect_values[0].v_pointer;
* // keep a flag for the value_free() implementation to not free this string
* value->data[1].v_uint = G_VALUE_NOCOPY_CONTENTS;
* }
* else
* value->data[0].v_pointer = g_strdup (collect_values[0].v_pointer);
* return NULL;
* ]|
* It should be noted, that it is generally a bad idea to follow the
* #G_VALUE_NOCOPY_CONTENTS hint for reference counted types. Due to
* reentrancy requirements and reference count assertions performed
* by the signal emission code, reference counts should always be
* incremented for reference counted contents stored in the value->data
* array. To deviate from our string example for a moment, and taking
* a look at an exemplary implementation for collect_value() of
* #GObject:
* |[<!-- language="C" -->
* if (collect_values[0].v_pointer)
* {
* GObject *object = G_OBJECT (collect_values[0].v_pointer);
* // never honour G_VALUE_NOCOPY_CONTENTS for ref-counted types
* value->data[0].v_pointer = g_object_ref (object);
* return NULL;
* }
* else
* return g_strdup_printf ("Object passed as invalid NULL pointer");
* }
* ]|
* The reference count for valid objects is always incremented,
* regardless of @collect_flags. For invalid objects, the example
* returns a newly allocated string without altering @value.
* Upon success, collect_value() needs to return %NULL. If, however,
* an error condition occurred, collect_value() may spew an
* error by returning a newly allocated non-%NULL string, giving
* a suitable description of the error condition.
* The calling code makes no assumptions about the @value
* contents being valid upon error returns, @value
* is simply thrown away without further freeing. As such, it is
* a good idea to not allocate #GValue contents, prior to returning
* an error, however, collect_values() is not obliged to return
* a correctly setup @value for error returns, simply because
* any non-%NULL return is considered a fatal condition so further
* program behaviour is undefined.
* @lcopy_format: Format description of the arguments to collect for @lcopy_value,
* analogous to @collect_format. Usually, @lcopy_format string consists
* only of 'p's to provide lcopy_value() with pointers to storage locations.
* @lcopy_value: This function is responsible for storing the @value contents into
* arguments passed through a variable argument list which got
* collected into @collect_values according to @lcopy_format.
* @n_collect_values equals the string length of @lcopy_format,
* and @collect_flags may contain %G_VALUE_NOCOPY_CONTENTS.
* In contrast to collect_value(), lcopy_value() is obliged to
* always properly support %G_VALUE_NOCOPY_CONTENTS.
* Similar to collect_value() the function may prematurely abort
* by returning a newly allocated string describing an error condition.
* To complete the string example:
* |[<!-- language="C" -->
* gchar **string_p = collect_values[0].v_pointer;
* if (!string_p)
* return g_strdup_printf ("string location passed as NULL");
* if (collect_flags & G_VALUE_NOCOPY_CONTENTS)
* *string_p = value->data[0].v_pointer;
* else
* *string_p = g_strdup (value->data[0].v_pointer);
* ]|
* And an illustrative version of lcopy_value() for
* reference-counted types:
* |[<!-- language="C" -->
* GObject **object_p = collect_values[0].v_pointer;
* if (!object_p)
* return g_strdup_printf ("object location passed as NULL");
* if (!value->data[0].v_pointer)
* *object_p = NULL;
* else if (collect_flags & G_VALUE_NOCOPY_CONTENTS) // always honour
* *object_p = value->data[0].v_pointer;
* else
* *object_p = g_object_ref (value->data[0].v_pointer);
* return NULL;
* ]|
*
* The #GTypeValueTable provides the functions required by the #GValue
* implementation, to serve as a container for values of a type.
*/
struct _GTypeValueTable
{
void (*value_init) (GValue *value);
void (*value_free) (GValue *value);
void (*value_copy) (const GValue *src_value,
GValue *dest_value);
/* varargs functionality (optional) */
gpointer (*value_peek_pointer) (const GValue *value);
const gchar *collect_format;
gchar* (*collect_value) (GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags);
const gchar *lcopy_format;
gchar* (*lcopy_value) (const GValue *value,
guint n_collect_values,
GTypeCValue *collect_values,
guint collect_flags);
};
GLIB_AVAILABLE_IN_ALL
GType g_type_register_static (GType parent_type,
const gchar *type_name,
const GTypeInfo *info,
GTypeFlags flags);
GLIB_AVAILABLE_IN_ALL
GType g_type_register_static_simple (GType parent_type,
const gchar *type_name,
guint class_size,
GClassInitFunc class_init,
guint instance_size,
GInstanceInitFunc instance_init,
GTypeFlags flags);
GLIB_AVAILABLE_IN_ALL
GType g_type_register_dynamic (GType parent_type,
const gchar *type_name,
GTypePlugin *plugin,
GTypeFlags flags);
GLIB_AVAILABLE_IN_ALL
GType g_type_register_fundamental (GType type_id,
const gchar *type_name,
const GTypeInfo *info,
const GTypeFundamentalInfo *finfo,
GTypeFlags flags);
GLIB_AVAILABLE_IN_ALL
void g_type_add_interface_static (GType instance_type,
GType interface_type,
const GInterfaceInfo *info);
GLIB_AVAILABLE_IN_ALL
void g_type_add_interface_dynamic (GType instance_type,
GType interface_type,
GTypePlugin *plugin);
GLIB_AVAILABLE_IN_ALL
void g_type_interface_add_prerequisite (GType interface_type,
GType prerequisite_type);
GLIB_AVAILABLE_IN_ALL
GType*g_type_interface_prerequisites (GType interface_type,
guint *n_prerequisites);
GLIB_AVAILABLE_IN_ALL
void g_type_class_add_private (gpointer g_class,
gsize private_size);
GLIB_AVAILABLE_IN_2_38
gint g_type_add_instance_private (GType class_type,
gsize private_size);
GLIB_AVAILABLE_IN_ALL
gpointer g_type_instance_get_private (GTypeInstance *instance,
GType private_type);
GLIB_AVAILABLE_IN_2_38
void g_type_class_adjust_private_offset (gpointer g_class,
gint *private_size_or_offset);
GLIB_AVAILABLE_IN_ALL
void g_type_add_class_private (GType class_type,
gsize private_size);
GLIB_AVAILABLE_IN_ALL
gpointer g_type_class_get_private (GTypeClass *klass,
GType private_type);
GLIB_AVAILABLE_IN_2_38
gint g_type_class_get_instance_private_offset (gpointer g_class);
GLIB_AVAILABLE_IN_2_34
void g_type_ensure (GType type);
GLIB_AVAILABLE_IN_2_36
guint g_type_get_type_registration_serial (void);
/* --- GType boilerplate --- */
/**
* G_DECLARE_FINAL_TYPE:
* @ModuleObjName: The name of the new type, in camel case (like GtkWidget)
* @module_obj_name: The name of the new type in lowercase, with words
* separated by '_' (like 'gtk_widget')
* @MODULE: The name of the module, in all caps (like 'GTK')
* @OBJ_NAME: The bare name of the type, in all caps (like 'WIDGET')
* @ParentName: the name of the parent type, in camel case (like GtkWidget)
*
* A convenience macro for emitting the usual declarations in the header file for a type which is not (at the
* present time) intended to be subclassed.
*
* You might use it in a header as follows:
*
* |[
* #ifndef _myapp_window_h_
* #define _myapp_window_h_
*
* #include <gtk/gtk.h>
*
* #define MY_APP_TYPE_WINDOW my_app_window_get_type ()
* G_DECLARE_FINAL_TYPE (MyAppWindow, my_app_window, MY_APP, WINDOW, GtkWindow)
*
* MyAppWindow * my_app_window_new (void);
*
* ...
*
* #endif
* ]|
*
* This results in the following things happening:
*
* - the usual my_app_window_get_type() function is declared with a return type of #GType
*
* - the MyAppWindow types is defined as a typedef of struct _MyAppWindow. The struct itself is not
* defined and should be defined from the .c file before G_DEFINE_TYPE() is used.
*
* - the MY_APP_WINDOW() cast is emitted as static inline function along with the MY_APP_IS_WINDOW() type
* checking function
*
* - the MyAppWindowClass type is defined as a struct containing GtkWindowClass. This is done for the
* convenience of the person defining the type and should not be considered to be part of the ABI. In
* particular, without a firm declaration of the instance structure, it is not possible to subclass the type
* and therefore the fact that the size of the class structure is exposed is not a concern and it can be
* freely changed at any point in the future.
*
* - g_autoptr() support being added for your type, based on the type of your parent class
*
* You can only use this function if your parent type also supports g_autoptr().
*
* Because the type macro (MY_APP_TYPE_WINDOW in the above example) is not a callable, you must continue to
* manually define this as a macro for yourself.
*
* The declaration of the _get_type() function is the first thing emitted by the macro. This allows this macro
* to be used in the usual way with export control and API versioning macros.
*
* If you want to declare your own class structure, use G_DECLARE_DERIVABLE_TYPE().
*
* If you are writing a library, it is important to note that it is possible to convert a type from using
* G_DECLARE_FINAL_TYPE() to G_DECLARE_DERIVABLE_TYPE() without breaking API or ABI. As a precaution, you
* should therefore use G_DECLARE_FINAL_TYPE() until you are sure that it makes sense for your class to be
* subclassed. Once a class structure has been exposed it is not possible to change its size or remove or
* reorder items without breaking the API and/or ABI.
*
* Since: 2.44
**/
#define G_DECLARE_FINAL_TYPE(ModuleObjName, module_obj_name, MODULE, OBJ_NAME, ParentName) \
GType module_obj_name##_get_type (void); \
G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
typedef struct _##ModuleObjName ModuleObjName; \
typedef struct { ParentName##Class parent_class; } ModuleObjName##Class; \
\
_GLIB_DEFINE_AUTOPTR_CHAINUP (ModuleObjName, ParentName) \
\
static inline ModuleObjName * MODULE##_##OBJ_NAME (gpointer ptr) { \
return G_TYPE_CHECK_INSTANCE_CAST (ptr, module_obj_name##_get_type (), ModuleObjName); } \
static inline gboolean MODULE##_IS_##OBJ_NAME (gpointer ptr) { \
return G_TYPE_CHECK_INSTANCE_TYPE (ptr, module_obj_name##_get_type ()); } \
G_GNUC_END_IGNORE_DEPRECATIONS
/**
* G_DECLARE_DERIVABLE_TYPE:
* @ModuleObjName: The name of the new type, in camel case (like GtkWidget)
* @module_obj_name: The name of the new type in lowercase, with words
* separated by '_' (like 'gtk_widget')
* @MODULE: The name of the module, in all caps (like 'GTK')
* @OBJ_NAME: The bare name of the type, in all caps (like 'WIDGET')
* @ParentName: the name of the parent type, in camel case (like GtkWidget)
*
* A convenience macro for emitting the usual declarations in the header file for a type which will is intended
* to be subclassed.
*
* You might use it in a header as follows:
*
* |[
* #ifndef _gtk_frobber_h_
* #define _gtk_frobber_h_
*
* #define GTK_TYPE_FROBBER gtk_frobber_get_type ()
* GDK_AVAILABLE_IN_3_12
* G_DECLARE_DERIVABLE_TYPE (GtkFrobber, gtk_frobber, GTK, FROBBER, GtkWidget)
*
* struct _GtkFrobberClass
* {
* GtkWidgetClass parent_class;
*
* void (* handle_frob) (GtkFrobber *frobber,
* guint n_frobs);
*
* gpointer padding[12];
* };
*
* GtkWidget * gtk_frobber_new (void);
*
* ...
*
* #endif
* ]|
*
* This results in the following things happening:
*
* - the usual gtk_frobber_get_type() function is declared with a return type of #GType
*
* - the GtkFrobber struct is created with GtkWidget as the first and only item. You are expected to use
* a private structure from your .c file to store your instance variables.
*
* - the GtkFrobberClass type is defined as a typedef to struct _GtkFrobberClass, which is left undefined.
* You should do this from the header file directly after you use the macro.
*
* - the GTK_FROBBER() and GTK_FROBBER_CLASS() casts are emitted as static inline functions along with
* the GTK_IS_FROBBER() and GTK_IS_FROBBER_CLASS() type checking functions and GTK_FROBBER_GET_CLASS()
* function.
*
* - g_autoptr() support being added for your type, based on the type of your parent class
*
* You can only use this function if your parent type also supports g_autoptr().
*
* Because the type macro (GTK_TYPE_FROBBER in the above example) is not a callable, you must continue to
* manually define this as a macro for yourself.
*
* The declaration of the _get_type() function is the first thing emitted by the macro. This allows this macro
* to be used in the usual way with export control and API versioning macros.
*
* If you are writing a library, it is important to note that it is possible to convert a type from using
* G_DECLARE_FINAL_TYPE() to G_DECLARE_DERIVABLE_TYPE() without breaking API or ABI. As a precaution, you
* should therefore use G_DECLARE_FINAL_TYPE() until you are sure that it makes sense for your class to be
* subclassed. Once a class structure has been exposed it is not possible to change its size or remove or
* reorder items without breaking the API and/or ABI. If you want to declare your own class structure, use
* G_DECLARE_DERIVABLE_TYPE(). If you want to declare a class without exposing the class or instance
* structures, use G_DECLARE_FINAL_TYPE().
*
* If you must use G_DECLARE_DERIVABLE_TYPE() you should be sure to include some padding at the bottom of your
* class structure to leave space for the addition of future virtual functions.
*
* Since: 2.44
**/
#define G_DECLARE_DERIVABLE_TYPE(ModuleObjName, module_obj_name, MODULE, OBJ_NAME, ParentName) \
GType module_obj_name##_get_type (void); \
G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
typedef struct _##ModuleObjName ModuleObjName; \
typedef struct _##ModuleObjName##Class ModuleObjName##Class; \
struct _##ModuleObjName { ParentName parent_instance; }; \
\
_GLIB_DEFINE_AUTOPTR_CHAINUP (ModuleObjName, ParentName) \
\
static inline ModuleObjName * MODULE##_##OBJ_NAME (gpointer ptr) { \
return G_TYPE_CHECK_INSTANCE_CAST (ptr, module_obj_name##_get_type (), ModuleObjName); } \
static inline ModuleObjName##Class * MODULE##_##OBJ_NAME##_CLASS (gpointer ptr) { \
return G_TYPE_CHECK_CLASS_CAST (ptr, module_obj_name##_get_type (), ModuleObjName##Class); } \
static inline gboolean MODULE##_IS_##OBJ_NAME (gpointer ptr) { \
return G_TYPE_CHECK_INSTANCE_TYPE (ptr, module_obj_name##_get_type ()); } \
static inline gboolean MODULE##_IS_##OBJ_NAME##_CLASS (gpointer ptr) { \
return G_TYPE_CHECK_CLASS_TYPE (ptr, module_obj_name##_get_type ()); } \
static inline ModuleObjName##Class * MODULE##_##OBJ_NAME##_GET_CLASS (gpointer ptr) { \
return G_TYPE_INSTANCE_GET_CLASS (ptr, module_obj_name##_get_type (), ModuleObjName##Class); } \
G_GNUC_END_IGNORE_DEPRECATIONS
/**
* G_DECLARE_INTERFACE:
* @ModuleObjName: The name of the new type, in camel case (like GtkWidget)
* @module_obj_name: The name of the new type in lowercase, with words
* separated by '_' (like 'gtk_widget')
* @MODULE: The name of the module, in all caps (like 'GTK')
* @OBJ_NAME: The bare name of the type, in all caps (like 'WIDGET')
* @PrerequisiteName: the name of the prerequisite type, in camel case (like GtkWidget)
*
* A convenience macro for emitting the usual declarations in the header file for a GInterface type.
*
* You might use it in a header as follows:
*
* |[
* #ifndef _my_model_h_
* #define _my_model_h_
*
* #define MY_TYPE_MODEL my_model_get_type ()
* GDK_AVAILABLE_IN_3_12
* G_DECLARE_INTERFACE (MyModel, my_model, MY, MODEL, GObject)
*
* struct _MyModelInterface
* {
* GTypeInterface g_iface;
*
* gpointer (* get_item) (MyModel *model);
* };
*
* gpointer my_model_get_item (MyModel *model);
*
* ...
*
* #endif
* ]|
*
* This results in the following things happening:
*
* - the usual my_model_get_type() function is declared with a return type of #GType
*
* - the MyModelInterface type is defined as a typedef to struct _MyModelInterface,
* which is left undefined. You should do this from the header file directly after
* you use the macro.
*
* - the MY_MODEL() cast is emitted as static inline functions along with
* the MY_IS_MODEL() type checking function and MY_MODEL_GET_IFACE() function.
*
* - g_autoptr() support being added for your type, based on your prerequisite type.
*
* You can only use this function if your prerequisite type also supports g_autoptr().
*
* Because the type macro (MY_TYPE_MODEL in the above example) is not a callable, you must continue to
* manually define this as a macro for yourself.
*
* The declaration of the _get_type() function is the first thing emitted by the macro. This allows this macro
* to be used in the usual way with export control and API versioning macros.
*
* Since: 2.44
**/
#define G_DECLARE_INTERFACE(ModuleObjName, module_obj_name, MODULE, OBJ_NAME, PrerequisiteName) \
GType module_obj_name##_get_type (void); \
G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
typedef struct _##ModuleObjName ModuleObjName; \
typedef struct _##ModuleObjName##Interface ModuleObjName##Interface; \
\
_GLIB_DEFINE_AUTOPTR_CHAINUP (ModuleObjName, PrerequisiteName) \
\
static inline ModuleObjName * MODULE##_##OBJ_NAME (gpointer ptr) { \
return G_TYPE_CHECK_INSTANCE_CAST (ptr, module_obj_name##_get_type (), ModuleObjName); } \
static inline gboolean MODULE##_IS_##OBJ_NAME (gpointer ptr) { \
return G_TYPE_CHECK_INSTANCE_TYPE (ptr, module_obj_name##_get_type ()); } \
static inline ModuleObjName##Interface * MODULE##_##OBJ_NAME##_GET_IFACE (gpointer ptr) { \
return G_TYPE_INSTANCE_GET_INTERFACE (ptr, module_obj_name##_get_type (), ModuleObjName##Interface); } \
G_GNUC_END_IGNORE_DEPRECATIONS
/**
* G_DEFINE_TYPE:
* @TN: The name of the new type, in Camel case.
* @t_n: The name of the new type, in lowercase, with words
* separated by '_'.
* @T_P: The #GType of the parent type.
*
* A convenience macro for type implementations, which declares a class
* initialization function, an instance initialization function (see #GTypeInfo
* for information about these) and a static variable named `t_n_parent_class`
* pointing to the parent class. Furthermore, it defines a *_get_type() function.
* See G_DEFINE_TYPE_EXTENDED() for an example.
*
* Since: 2.4
*/
#define G_DEFINE_TYPE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, 0, {})
/**
* G_DEFINE_TYPE_WITH_CODE:
* @TN: The name of the new type, in Camel case.
* @t_n: The name of the new type in lowercase, with words separated by '_'.
* @T_P: The #GType of the parent type.
* @_C_: Custom code that gets inserted in the *_get_type() function.
*
* A convenience macro for type implementations.
* Similar to G_DEFINE_TYPE(), but allows you to insert custom code into the
* *_get_type() function, e.g. interface implementations via G_IMPLEMENT_INTERFACE().
* See G_DEFINE_TYPE_EXTENDED() for an example.
*
* Since: 2.4
*/
#define G_DEFINE_TYPE_WITH_CODE(TN, t_n, T_P, _C_) _G_DEFINE_TYPE_EXTENDED_BEGIN (TN, t_n, T_P, 0) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
/**
* G_DEFINE_TYPE_WITH_PRIVATE:
* @TN: The name of the new type, in Camel case.
* @t_n: The name of the new type, in lowercase, with words
* separated by '_'.
* @T_P: The #GType of the parent type.
*
* A convenience macro for type implementations, which declares a class
* initialization function, an instance initialization function (see #GTypeInfo
* for information about these), a static variable named `t_n_parent_class`
* pointing to the parent class, and adds private instance data to the type.
* Furthermore, it defines a *_get_type() function. See G_DEFINE_TYPE_EXTENDED()
* for an example.
*
* Note that private structs added with this macros must have a struct
* name of the form @TN Private.
*
* Since: 2.38
*/
#define G_DEFINE_TYPE_WITH_PRIVATE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, 0, G_ADD_PRIVATE (TN))
/**
* G_DEFINE_ABSTRACT_TYPE:
* @TN: The name of the new type, in Camel case.
* @t_n: The name of the new type, in lowercase, with words
* separated by '_'.
* @T_P: The #GType of the parent type.
*
* A convenience macro for type implementations.
* Similar to G_DEFINE_TYPE(), but defines an abstract type.
* See G_DEFINE_TYPE_EXTENDED() for an example.
*
* Since: 2.4
*/
#define G_DEFINE_ABSTRACT_TYPE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, G_TYPE_FLAG_ABSTRACT, {})
/**
* G_DEFINE_ABSTRACT_TYPE_WITH_CODE:
* @TN: The name of the new type, in Camel case.
* @t_n: The name of the new type, in lowercase, with words
* separated by '_'.
* @T_P: The #GType of the parent type.
* @_C_: Custom code that gets inserted in the @type_name_get_type() function.
*
* A convenience macro for type implementations.
* Similar to G_DEFINE_TYPE_WITH_CODE(), but defines an abstract type and
* allows you to insert custom code into the *_get_type() function, e.g.
* interface implementations via G_IMPLEMENT_INTERFACE().
* See G_DEFINE_TYPE_EXTENDED() for an example.
*
* Since: 2.4
*/
#define G_DEFINE_ABSTRACT_TYPE_WITH_CODE(TN, t_n, T_P, _C_) _G_DEFINE_TYPE_EXTENDED_BEGIN (TN, t_n, T_P, G_TYPE_FLAG_ABSTRACT) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
/**
* G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE:
* @TN: The name of the new type, in Camel case.
* @t_n: The name of the new type, in lowercase, with words
* separated by '_'.
* @T_P: The #GType of the parent type.
*
* Similar to G_DEFINE_TYPE_WITH_PRIVATE(), but defines an abstract type.
* See G_DEFINE_TYPE_EXTENDED() for an example.
*
* Since: 2.38
*/
#define G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE(TN, t_n, T_P) G_DEFINE_TYPE_EXTENDED (TN, t_n, T_P, G_TYPE_FLAG_ABSTRACT, G_ADD_PRIVATE (TN))
/**
* G_DEFINE_TYPE_EXTENDED:
* @TN: The name of the new type, in Camel case.
* @t_n: The name of the new type, in lowercase, with words
* separated by '_'.
* @T_P: The #GType of the parent type.
* @_f_: #GTypeFlags to pass to g_type_register_static()
* @_C_: Custom code that gets inserted in the *_get_type() function.
*
* The most general convenience macro for type implementations, on which
* G_DEFINE_TYPE(), etc are based.
*
* |[<!-- language="C" -->
* G_DEFINE_TYPE_EXTENDED (GtkGadget,
* gtk_gadget,
* GTK_TYPE_WIDGET,
* 0,
* G_IMPLEMENT_INTERFACE (TYPE_GIZMO,
* gtk_gadget_gizmo_init));
* ]|
* expands to
* |[<!-- language="C" -->
* static void gtk_gadget_init (GtkGadget *self);
* static void gtk_gadget_class_init (GtkGadgetClass *klass);
* static gpointer gtk_gadget_parent_class = NULL;
* static void gtk_gadget_class_intern_init (gpointer klass)
* {
* gtk_gadget_parent_class = g_type_class_peek_parent (klass);
* gtk_gadget_class_init ((GtkGadgetClass*) klass);
* }
*
* GType
* gtk_gadget_get_type (void)
* {
* static volatile gsize g_define_type_id__volatile = 0;
* if (g_once_init_enter (&g_define_type_id__volatile))
* {
* GType g_define_type_id =
* g_type_register_static_simple (GTK_TYPE_WIDGET,
* g_intern_static_string ("GtkGadget"),
* sizeof (GtkGadgetClass),
* (GClassInitFunc) gtk_gadget_class_intern_init,
* sizeof (GtkGadget),
* (GInstanceInitFunc) gtk_gadget_init,
* 0);
* {
* const GInterfaceInfo g_implement_interface_info = {
* (GInterfaceInitFunc) gtk_gadget_gizmo_init
* };
* g_type_add_interface_static (g_define_type_id, TYPE_GIZMO, &g_implement_interface_info);
* }
* g_once_init_leave (&g_define_type_id__volatile, g_define_type_id);
* }
* return g_define_type_id__volatile;
* }
* ]|
* The only pieces which have to be manually provided are the definitions of
* the instance and class structure and the definitions of the instance and
* class init functions.
*
* Since: 2.4
*/
#define G_DEFINE_TYPE_EXTENDED(TN, t_n, T_P, _f_, _C_) _G_DEFINE_TYPE_EXTENDED_BEGIN (TN, t_n, T_P, _f_) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
/**
* G_DEFINE_INTERFACE:
* @TN: The name of the new type, in Camel case.
* @t_n: The name of the new type, in lowercase, with words separated by '_'.
* @T_P: The #GType of the prerequisite type for the interface, or 0
* (%G_TYPE_INVALID) for no prerequisite type.
*
* A convenience macro for #GTypeInterface definitions, which declares
* a default vtable initialization function and defines a *_get_type()
* function.
*
* The macro expects the interface initialization function to have the
* name `t_n ## _default_init`, and the interface structure to have the
* name `TN ## Interface`.
*
* Since: 2.24
*/
#define G_DEFINE_INTERFACE(TN, t_n, T_P) G_DEFINE_INTERFACE_WITH_CODE(TN, t_n, T_P, ;)
/**
* G_DEFINE_INTERFACE_WITH_CODE:
* @TN: The name of the new type, in Camel case.
* @t_n: The name of the new type, in lowercase, with words separated by '_'.
* @T_P: The #GType of the prerequisite type for the interface, or 0
* (%G_TYPE_INVALID) for no prerequisite type.
* @_C_: Custom code that gets inserted in the *_get_type() function.
*
* A convenience macro for #GTypeInterface definitions. Similar to
* G_DEFINE_INTERFACE(), but allows you to insert custom code into the
* *_get_type() function, e.g. additional interface implementations
* via G_IMPLEMENT_INTERFACE(), or additional prerequisite types. See
* G_DEFINE_TYPE_EXTENDED() for a similar example using
* G_DEFINE_TYPE_WITH_CODE().
*
* Since: 2.24
*/
#define G_DEFINE_INTERFACE_WITH_CODE(TN, t_n, T_P, _C_) _G_DEFINE_INTERFACE_EXTENDED_BEGIN(TN, t_n, T_P) {_C_;} _G_DEFINE_INTERFACE_EXTENDED_END()
/**
* G_IMPLEMENT_INTERFACE:
* @TYPE_IFACE: The #GType of the interface to add
* @iface_init: The interface init function
*
* A convenience macro to ease interface addition in the `_C_` section
* of G_DEFINE_TYPE_WITH_CODE() or G_DEFINE_ABSTRACT_TYPE_WITH_CODE().
* See G_DEFINE_TYPE_EXTENDED() for an example.
*
* Note that this macro can only be used together with the G_DEFINE_TYPE_*
* macros, since it depends on variable names from those macros.
*
* Since: 2.4
*/
#define G_IMPLEMENT_INTERFACE(TYPE_IFACE, iface_init) { \
const GInterfaceInfo g_implement_interface_info = { \
(GInterfaceInitFunc)(void (*)(void)) iface_init, NULL, NULL \
}; \
g_type_add_interface_static (g_define_type_id, TYPE_IFACE, &g_implement_interface_info); \
}
/**
* G_ADD_PRIVATE:
* @TypeName: the name of the type in CamelCase
*
* A convenience macro to ease adding private data to instances of a new type
* in the @_C_ section of G_DEFINE_TYPE_WITH_CODE() or
* G_DEFINE_ABSTRACT_TYPE_WITH_CODE().
*
* For instance:
*
* |[<!-- language="C" -->
* typedef struct _MyObject MyObject;
* typedef struct _MyObjectClass MyObjectClass;
*
* typedef struct {
* gint foo;
* gint bar;
* } MyObjectPrivate;
*
* G_DEFINE_TYPE_WITH_CODE (MyObject, my_object, G_TYPE_OBJECT,
* G_ADD_PRIVATE (MyObject))
* ]|
*
* Will add MyObjectPrivate as the private data to any instance of the MyObject
* type.
*
* G_DEFINE_TYPE_* macros will automatically create a private function
* based on the arguments to this macro, which can be used to safely
* retrieve the private data from an instance of the type; for instance:
*
* |[<!-- language="C" -->
* gint
* my_object_get_foo (MyObject *obj)
* {
* MyObjectPrivate *priv = my_object_get_instance_private (obj);
*
* g_return_val_if_fail (MY_IS_OBJECT (obj), 0);
*
* return priv->foo;
* }
*
* void
* my_object_set_bar (MyObject *obj,
* gint bar)
* {
* MyObjectPrivate *priv = my_object_get_instance_private (obj);
*
* g_return_if_fail (MY_IS_OBJECT (obj));
*
* if (priv->bar != bar)
* priv->bar = bar;
* }
* ]|
*
* Note that this macro can only be used together with the G_DEFINE_TYPE_*
* macros, since it depends on variable names from those macros.
*
* Also note that private structs added with these macros must have a struct
* name of the form `TypeNamePrivate`.
*
* It is safe to call _get_instance_private on %NULL or invalid object since
* it's only adding an offset to the instance pointer. In that case the returned
* pointer must not be dereferenced.
*
* Since: 2.38
*/
#define G_ADD_PRIVATE(TypeName) { \
TypeName##_private_offset = \
g_type_add_instance_private (g_define_type_id, sizeof (TypeName##Private)); \
}
/**
* G_PRIVATE_OFFSET:
* @TypeName: the name of the type in CamelCase
* @field: the name of the field in the private data structure
*
* Evaluates to the offset of the @field inside the instance private data
* structure for @TypeName.
*
* Note that this macro can only be used together with the G_DEFINE_TYPE_*
* and G_ADD_PRIVATE() macros, since it depends on variable names from
* those macros.
*
* Since: 2.38
*/
#define G_PRIVATE_OFFSET(TypeName, field) \
(TypeName##_private_offset + (G_STRUCT_OFFSET (TypeName##Private, field)))
/**
* G_PRIVATE_FIELD_P:
* @TypeName: the name of the type in CamelCase
* @inst: the instance of @TypeName you wish to access
* @field_name: the name of the field in the private data structure
*
* Evaluates to a pointer to the @field_name inside the @inst private data
* structure for @TypeName.
*
* Note that this macro can only be used together with the G_DEFINE_TYPE_*
* and G_ADD_PRIVATE() macros, since it depends on variable names from
* those macros.
*
* Since: 2.38
*/
#define G_PRIVATE_FIELD_P(TypeName, inst, field_name) \
G_STRUCT_MEMBER_P (inst, G_PRIVATE_OFFSET (TypeName, field_name))
/**
* G_PRIVATE_FIELD:
* @TypeName: the name of the type in CamelCase
* @inst: the instance of @TypeName you wish to access
* @field_type: the type of the field in the private data structure
* @field_name: the name of the field in the private data structure
*
* Evaluates to the @field_name inside the @inst private data
* structure for @TypeName.
*
* Note that this macro can only be used together with the G_DEFINE_TYPE_*
* and G_ADD_PRIVATE() macros, since it depends on variable names from
* those macros.
*
* Since: 2.38
*/
#define G_PRIVATE_FIELD(TypeName, inst, field_type, field_name) \
G_STRUCT_MEMBER (field_type, inst, G_PRIVATE_OFFSET (TypeName, field_name))
/* we need to have this macro under conditional expansion, as it references
* a function that has been added in 2.38. see bug:
* https://bugzilla.gnome.org/show_bug.cgi?id=703191
*/
#if GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_38
#define _G_DEFINE_TYPE_EXTENDED_CLASS_INIT(TypeName, type_name) \
static void type_name##_class_intern_init (gpointer klass) \
{ \
type_name##_parent_class = g_type_class_peek_parent (klass); \
if (TypeName##_private_offset != 0) \
g_type_class_adjust_private_offset (klass, &TypeName##_private_offset); \
type_name##_class_init ((TypeName##Class*) klass); \
}
#else
#define _G_DEFINE_TYPE_EXTENDED_CLASS_INIT(TypeName, type_name) \
static void type_name##_class_intern_init (gpointer klass) \
{ \
type_name##_parent_class = g_type_class_peek_parent (klass); \
type_name##_class_init ((TypeName##Class*) klass); \
}
#endif /* GLIB_VERSION_MAX_ALLOWED >= GLIB_VERSION_2_38 */
/* Added for _G_DEFINE_TYPE_EXTENDED_WITH_PRELUDE */
#define _G_DEFINE_TYPE_EXTENDED_BEGIN_PRE(TypeName, type_name, TYPE_PARENT) \
\
static void type_name##_init (TypeName *self); \
static void type_name##_class_init (TypeName##Class *klass); \
static gpointer type_name##_parent_class = NULL; \
static gint TypeName##_private_offset; \
\
_G_DEFINE_TYPE_EXTENDED_CLASS_INIT(TypeName, type_name) \
\
G_GNUC_UNUSED \
static inline gpointer \
type_name##_get_instance_private (TypeName *self) \
{ \
return (G_STRUCT_MEMBER_P (self, TypeName##_private_offset)); \
} \
\
GType \
type_name##_get_type (void) \
{ \
static volatile gsize g_define_type_id__volatile = 0;
/* Prelude goes here */
/* Added for _G_DEFINE_TYPE_EXTENDED_WITH_PRELUDE */
#define _G_DEFINE_TYPE_EXTENDED_BEGIN_REGISTER(TypeName, type_name, TYPE_PARENT, flags) \
if (g_once_init_enter (&g_define_type_id__volatile)) \
{ \
GType g_define_type_id = \
g_type_register_static_simple (TYPE_PARENT, \
g_intern_static_string (#TypeName), \
sizeof (TypeName##Class), \
(GClassInitFunc)(void (*)(void)) type_name##_class_intern_init, \
sizeof (TypeName), \
(GInstanceInitFunc)(void (*)(void)) type_name##_init, \
(GTypeFlags) flags); \
{ /* custom code follows */
#define _G_DEFINE_TYPE_EXTENDED_END() \
/* following custom code */ \
} \
g_once_init_leave (&g_define_type_id__volatile, g_define_type_id); \
} \
return g_define_type_id__volatile; \
} /* closes type_name##_get_type() */
/* This was defined before we had G_DEFINE_TYPE_WITH_CODE_AND_PRELUDE, it's simplest
* to keep it.
*/
#define _G_DEFINE_TYPE_EXTENDED_BEGIN(TypeName, type_name, TYPE_PARENT, flags) \
_G_DEFINE_TYPE_EXTENDED_BEGIN_PRE(TypeName, type_name, TYPE_PARENT) \
_G_DEFINE_TYPE_EXTENDED_BEGIN_REGISTER(TypeName, type_name, TYPE_PARENT, flags) \
#define _G_DEFINE_INTERFACE_EXTENDED_BEGIN(TypeName, type_name, TYPE_PREREQ) \
\
static void type_name##_default_init (TypeName##Interface *klass); \
\
GType \
type_name##_get_type (void) \
{ \
static volatile gsize g_define_type_id__volatile = 0; \
if (g_once_init_enter (&g_define_type_id__volatile)) \
{ \
GType g_define_type_id = \
g_type_register_static_simple (G_TYPE_INTERFACE, \
g_intern_static_string (#TypeName), \
sizeof (TypeName##Interface), \
(GClassInitFunc)(void (*)(void)) type_name##_default_init, \
0, \
(GInstanceInitFunc)NULL, \
(GTypeFlags) 0); \
if (TYPE_PREREQ) \
g_type_interface_add_prerequisite (g_define_type_id, TYPE_PREREQ); \
{ /* custom code follows */
#define _G_DEFINE_INTERFACE_EXTENDED_END() \
/* following custom code */ \
} \
g_once_init_leave (&g_define_type_id__volatile, g_define_type_id); \
} \
return g_define_type_id__volatile; \
} /* closes type_name##_get_type() */
/**
* G_DEFINE_BOXED_TYPE:
* @TypeName: The name of the new type, in Camel case
* @type_name: The name of the new type, in lowercase, with words
* separated by '_'
* @copy_func: the #GBoxedCopyFunc for the new type
* @free_func: the #GBoxedFreeFunc for the new type
*
* A convenience macro for boxed type implementations, which defines a
* type_name_get_type() function registering the boxed type.
*
* Since: 2.26
*/
#define G_DEFINE_BOXED_TYPE(TypeName, type_name, copy_func, free_func) G_DEFINE_BOXED_TYPE_WITH_CODE (TypeName, type_name, copy_func, free_func, {})
/**
* G_DEFINE_BOXED_TYPE_WITH_CODE:
* @TypeName: The name of the new type, in Camel case
* @type_name: The name of the new type, in lowercase, with words
* separated by '_'
* @copy_func: the #GBoxedCopyFunc for the new type
* @free_func: the #GBoxedFreeFunc for the new type
* @_C_: Custom code that gets inserted in the *_get_type() function
*
* A convenience macro for boxed type implementations.
* Similar to G_DEFINE_BOXED_TYPE(), but allows to insert custom code into the
* type_name_get_type() function, e.g. to register value transformations with
* g_value_register_transform_func(), for instance:
*
* |[<!-- language="C" -->
* G_DEFINE_BOXED_TYPE_WITH_CODE (GdkRectangle, gdk_rectangle,
* gdk_rectangle_copy,
* gdk_rectangle_free,
* register_rectangle_transform_funcs (g_define_type_id))
* ]|
*
* Similarly to the %G_DEFINE_TYPE family of macros, the #GType of the newly
* defined boxed type is exposed in the `g_define_type_id` variable.
*
* Since: 2.26
*/
#define G_DEFINE_BOXED_TYPE_WITH_CODE(TypeName, type_name, copy_func, free_func, _C_) _G_DEFINE_BOXED_TYPE_BEGIN (TypeName, type_name, copy_func, free_func) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
/* Only use this in non-C++ on GCC >= 2.7, except for Darwin/ppc64.
* See https://bugzilla.gnome.org/show_bug.cgi?id=647145
*/
#if !defined (__cplusplus) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)) && !(defined (__APPLE__) && defined (__ppc64__))
#define _G_DEFINE_BOXED_TYPE_BEGIN(TypeName, type_name, copy_func, free_func) \
GType \
type_name##_get_type (void) \
{ \
static volatile gsize g_define_type_id__volatile = 0; \
if (g_once_init_enter (&g_define_type_id__volatile)) \
{ \
GType (* _g_register_boxed) \
(const gchar *, \
union \
{ \
TypeName * (*do_copy_type) (TypeName *); \
TypeName * (*do_const_copy_type) (const TypeName *); \
GBoxedCopyFunc do_copy_boxed; \
} __attribute__((__transparent_union__)), \
union \
{ \
void (* do_free_type) (TypeName *); \
GBoxedFreeFunc do_free_boxed; \
} __attribute__((__transparent_union__)) \
) = g_boxed_type_register_static; \
GType g_define_type_id = \
_g_register_boxed (g_intern_static_string (#TypeName), copy_func, free_func); \
{ /* custom code follows */
#else
#define _G_DEFINE_BOXED_TYPE_BEGIN(TypeName, type_name, copy_func, free_func) \
GType \
type_name##_get_type (void) \
{ \
static volatile gsize g_define_type_id__volatile = 0; \
if (g_once_init_enter (&g_define_type_id__volatile)) \
{ \
GType g_define_type_id = \
g_boxed_type_register_static (g_intern_static_string (#TypeName), \
(GBoxedCopyFunc) copy_func, \
(GBoxedFreeFunc) free_func); \
{ /* custom code follows */
#endif /* __GNUC__ */
/**
* G_DEFINE_POINTER_TYPE:
* @TypeName: The name of the new type, in Camel case
* @type_name: The name of the new type, in lowercase, with words
* separated by '_'
*
* A convenience macro for pointer type implementations, which defines a
* type_name_get_type() function registering the pointer type.
*
* Since: 2.26
*/
#define G_DEFINE_POINTER_TYPE(TypeName, type_name) G_DEFINE_POINTER_TYPE_WITH_CODE (TypeName, type_name, {})
/**
* G_DEFINE_POINTER_TYPE_WITH_CODE:
* @TypeName: The name of the new type, in Camel case
* @type_name: The name of the new type, in lowercase, with words
* separated by '_'
* @_C_: Custom code that gets inserted in the *_get_type() function
*
* A convenience macro for pointer type implementations.
* Similar to G_DEFINE_POINTER_TYPE(), but allows to insert
* custom code into the type_name_get_type() function.
*
* Since: 2.26
*/
#define G_DEFINE_POINTER_TYPE_WITH_CODE(TypeName, type_name, _C_) _G_DEFINE_POINTER_TYPE_BEGIN (TypeName, type_name) {_C_;} _G_DEFINE_TYPE_EXTENDED_END()
#define _G_DEFINE_POINTER_TYPE_BEGIN(TypeName, type_name) \
GType \
type_name##_get_type (void) \
{ \
static volatile gsize g_define_type_id__volatile = 0; \
if (g_once_init_enter (&g_define_type_id__volatile)) \
{ \
GType g_define_type_id = \
g_pointer_type_register_static (g_intern_static_string (#TypeName)); \
{ /* custom code follows */
/* --- protected (for fundamental type implementations) --- */
GLIB_AVAILABLE_IN_ALL
GTypePlugin* g_type_get_plugin (GType type);
GLIB_AVAILABLE_IN_ALL
GTypePlugin* g_type_interface_get_plugin (GType instance_type,
GType interface_type);
GLIB_AVAILABLE_IN_ALL
GType g_type_fundamental_next (void);
GLIB_AVAILABLE_IN_ALL
GType g_type_fundamental (GType type_id);
GLIB_AVAILABLE_IN_ALL
GTypeInstance* g_type_create_instance (GType type);
GLIB_AVAILABLE_IN_ALL
void g_type_free_instance (GTypeInstance *instance);
GLIB_AVAILABLE_IN_ALL
void g_type_add_class_cache_func (gpointer cache_data,
GTypeClassCacheFunc cache_func);
GLIB_AVAILABLE_IN_ALL
void g_type_remove_class_cache_func (gpointer cache_data,
GTypeClassCacheFunc cache_func);
GLIB_AVAILABLE_IN_ALL
void g_type_class_unref_uncached (gpointer g_class);
GLIB_AVAILABLE_IN_ALL
void g_type_add_interface_check (gpointer check_data,
GTypeInterfaceCheckFunc check_func);
GLIB_AVAILABLE_IN_ALL
void g_type_remove_interface_check (gpointer check_data,
GTypeInterfaceCheckFunc check_func);
GLIB_AVAILABLE_IN_ALL
GTypeValueTable* g_type_value_table_peek (GType type);
/*< private >*/
GLIB_AVAILABLE_IN_ALL
gboolean g_type_check_instance (GTypeInstance *instance) G_GNUC_PURE;
GLIB_AVAILABLE_IN_ALL
GTypeInstance* g_type_check_instance_cast (GTypeInstance *instance,
GType iface_type);
GLIB_AVAILABLE_IN_ALL
gboolean g_type_check_instance_is_a (GTypeInstance *instance,
GType iface_type) G_GNUC_PURE;
GLIB_AVAILABLE_IN_2_42
gboolean g_type_check_instance_is_fundamentally_a (GTypeInstance *instance,
GType fundamental_type) G_GNUC_PURE;
GLIB_AVAILABLE_IN_ALL
GTypeClass* g_type_check_class_cast (GTypeClass *g_class,
GType is_a_type);
GLIB_AVAILABLE_IN_ALL
gboolean g_type_check_class_is_a (GTypeClass *g_class,
GType is_a_type) G_GNUC_PURE;
GLIB_AVAILABLE_IN_ALL
gboolean g_type_check_is_value_type (GType type) G_GNUC_CONST;
GLIB_AVAILABLE_IN_ALL
gboolean g_type_check_value (const GValue *value) G_GNUC_PURE;
GLIB_AVAILABLE_IN_ALL
gboolean g_type_check_value_holds (const GValue *value,
GType type) G_GNUC_PURE;
GLIB_AVAILABLE_IN_ALL
gboolean g_type_test_flags (GType type,
guint flags) G_GNUC_CONST;
/* --- debugging functions --- */
GLIB_AVAILABLE_IN_ALL
const gchar * g_type_name_from_instance (GTypeInstance *instance);
GLIB_AVAILABLE_IN_ALL
const gchar * g_type_name_from_class (GTypeClass *g_class);
/* --- implementation bits --- */
#ifndef G_DISABLE_CAST_CHECKS
# define _G_TYPE_CIC(ip, gt, ct) \
((ct*) g_type_check_instance_cast ((GTypeInstance*) ip, gt))
# define _G_TYPE_CCC(cp, gt, ct) \
((ct*) g_type_check_class_cast ((GTypeClass*) cp, gt))
#else /* G_DISABLE_CAST_CHECKS */
# define _G_TYPE_CIC(ip, gt, ct) ((ct*) ip)
# define _G_TYPE_CCC(cp, gt, ct) ((ct*) cp)
#endif /* G_DISABLE_CAST_CHECKS */
#define _G_TYPE_CHI(ip) (g_type_check_instance ((GTypeInstance*) ip))
#define _G_TYPE_CHV(vl) (g_type_check_value ((GValue*) vl))
#define _G_TYPE_IGC(ip, gt, ct) ((ct*) (((GTypeInstance*) ip)->g_class))
#define _G_TYPE_IGI(ip, gt, ct) ((ct*) g_type_interface_peek (((GTypeInstance*) ip)->g_class, gt))
#define _G_TYPE_CIFT(ip, ft) (g_type_check_instance_is_fundamentally_a ((GTypeInstance*) ip, ft))
#ifdef __GNUC__
# define _G_TYPE_CIT(ip, gt) (G_GNUC_EXTENSION ({ \
GTypeInstance *__inst = (GTypeInstance*) ip; GType __t = gt; gboolean __r; \
if (!__inst) \
__r = FALSE; \
else if (__inst->g_class && __inst->g_class->g_type == __t) \
__r = TRUE; \
else \
__r = g_type_check_instance_is_a (__inst, __t); \
__r; \
}))
# define _G_TYPE_CCT(cp, gt) (G_GNUC_EXTENSION ({ \
GTypeClass *__class = (GTypeClass*) cp; GType __t = gt; gboolean __r; \
if (!__class) \
__r = FALSE; \
else if (__class->g_type == __t) \
__r = TRUE; \
else \
__r = g_type_check_class_is_a (__class, __t); \
__r; \
}))
# define _G_TYPE_CVH(vl, gt) (G_GNUC_EXTENSION ({ \
const GValue *__val = (const GValue*) vl; GType __t = gt; gboolean __r; \
if (!__val) \
__r = FALSE; \
else if (__val->g_type == __t) \
__r = TRUE; \
else \
__r = g_type_check_value_holds (__val, __t); \
__r; \
}))
#else /* !__GNUC__ */
# define _G_TYPE_CIT(ip, gt) (g_type_check_instance_is_a ((GTypeInstance*) ip, gt))
# define _G_TYPE_CCT(cp, gt) (g_type_check_class_is_a ((GTypeClass*) cp, gt))
# define _G_TYPE_CVH(vl, gt) (g_type_check_value_holds ((const GValue*) vl, gt))
#endif /* !__GNUC__ */
/**
* G_TYPE_FLAG_RESERVED_ID_BIT:
*
* A bit in the type number that's supposed to be left untouched.
*/
#define G_TYPE_FLAG_RESERVED_ID_BIT ((GType) (1 << 0))
G_END_DECLS
#endif /* __G_TYPE_H__ */
|